If you have any questions or suggestions for improvement, please do not_____to contact our customer service center.

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问题 If you have any questions or suggestions for improvement, please do not_____to contact our customer service center.

选项 A、provide
B、complain
C、compromise
D、hesitate

答案D

解析本题要求选择合适的动词。根据句意，应该选择hesitate，意为“犹豫”。

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